/*
* FILE:	sha2.h
* AUTHOR:	Aaron D. Gifford - http://www.aarongifford.com/
*
* Copyright (c) 2000-2001, Aaron D. Gifford
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holder nor the names of contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTOR(S) ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTOR(S) BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: sha2.h,v 1.1 2001/11/08 00:02:01 adg Exp adg $
*/

#ifndef __SHA2_H__
#define __SHA2_H__

#ifdef DO_NOT_USE_CRYPTOPP_SHA

#ifdef __cplusplus
extern "C" {
#endif


	/*
	* Import u_intXX_t size_t type definitions from system headers.  You
	* may need to change this, or define these things yourself in this
	* file.
	*/
#include <sys/types.h>
#ifdef _WIN32
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN    4321
#define BYTE_ORDER LITTLE_ENDIAN
#define SHA2_USE_INTTYPES_H
#endif

#ifdef SHA2_USE_INTTYPES_H

#include <inttypes.h>

#endif /* SHA2_USE_INTTYPES_H */


	/*** SHA-256/384/512 Various Length Definitions ***********************/
#define SHA256_BLOCK_LENGTH		64
#define SHA256_DIGEST_LENGTH		32
#define SHA256_DIGEST_STRING_LENGTH	(SHA256_DIGEST_LENGTH * 2 + 1)
#define SHA384_BLOCK_LENGTH		128
#define SHA384_DIGEST_LENGTH		48
#define SHA384_DIGEST_STRING_LENGTH	(SHA384_DIGEST_LENGTH * 2 + 1)
#define SHA512_BLOCK_LENGTH		128
#define SHA512_DIGEST_LENGTH		64
#define SHA512_DIGEST_STRING_LENGTH	(SHA512_DIGEST_LENGTH * 2 + 1)


	/*** SHA-256/384/512 Context Structures *******************************/
	/* NOTE: If your architecture does not define either u_intXX_t types or
	* uintXX_t (from inttypes.h), you may need to define things by hand
	* for your system:
	*/
#if 0
	typedef unsigned char u_int8_t;		/* 1-byte  (8-bits)  */
	typedef unsigned int u_int32_t;		/* 4-bytes (32-bits) */
	typedef unsigned long long u_int64_t;	/* 8-bytes (64-bits) */
#endif
											/*
											* Most BSD systems already define u_intXX_t types, as does Linux.
											* Some systems, however, like Compaq's Tru64 Unix instead can use
											* uintXX_t types defined by very recent ANSI C standards and included
											* in the file:
											*
											*   #include <inttypes.h>
											*
											* If you choose to use <inttypes.h> then please define:
											*
											*   #define SHA2_USE_INTTYPES_H
											*
											* Or on the command line during compile:
											*
											*   cc -DSHA2_USE_INTTYPES_H ...
											*/
#ifdef SHA2_USE_INTTYPES_H

	typedef struct _SHA256_CTX {
		uint32_t	state[8];
		uint64_t	bitcount;
		uint8_t	buffer[SHA256_BLOCK_LENGTH];
	} SHA256_CTX;
	typedef struct _SHA512_CTX {
		uint64_t	state[8];
		uint64_t	bitcount[2];
		uint8_t	buffer[SHA512_BLOCK_LENGTH];
	} SHA512_CTX;

#else /* SHA2_USE_INTTYPES_H */

	typedef struct _SHA256_CTX {
		u_int32_t	state[8];
		u_int64_t	bitcount;
		u_int8_t	buffer[SHA256_BLOCK_LENGTH];
	} SHA256_CTX;
	typedef struct _SHA512_CTX {
		u_int64_t	state[8];
		u_int64_t	bitcount[2];
		u_int8_t	buffer[SHA512_BLOCK_LENGTH];
	} SHA512_CTX;

#endif /* SHA2_USE_INTTYPES_H */

	typedef SHA512_CTX SHA384_CTX;


	/*** SHA-256/384/512 Function Prototypes ******************************/
#ifndef NOPROTO
#ifdef SHA2_USE_INTTYPES_H

	void SHA256_Init(SHA256_CTX *);
	void SHA256_Update(SHA256_CTX*, const uint8_t*, size_t);
	void SHA256_Final(uint8_t[SHA256_DIGEST_LENGTH], SHA256_CTX*);
	char* SHA256_End(SHA256_CTX*, char[SHA256_DIGEST_STRING_LENGTH]);
	char* SHA256_Data(const uint8_t*, size_t, char[SHA256_DIGEST_STRING_LENGTH]);

	void SHA384_Init(SHA384_CTX*);
	void SHA384_Update(SHA384_CTX*, const uint8_t*, size_t);
	void SHA384_Final(uint8_t[SHA384_DIGEST_LENGTH], SHA384_CTX*);
	char* SHA384_End(SHA384_CTX*, char[SHA384_DIGEST_STRING_LENGTH]);
	char* SHA384_Data(const uint8_t*, size_t, char[SHA384_DIGEST_STRING_LENGTH]);

	void SHA512_Init(SHA512_CTX*);
	void SHA512_Update(SHA512_CTX*, const uint8_t*, size_t);
	void SHA512_Final(uint8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*);
	char* SHA512_End(SHA512_CTX*, char[SHA512_DIGEST_STRING_LENGTH]);
	char* SHA512_Data(const uint8_t*, size_t, char[SHA512_DIGEST_STRING_LENGTH]);

#else /* SHA2_USE_INTTYPES_H */

	void SHA256_Init(SHA256_CTX *);
	void SHA256_Update(SHA256_CTX*, const u_int8_t*, size_t);
	void SHA256_Final(u_int8_t[SHA256_DIGEST_LENGTH], SHA256_CTX*);
	char* SHA256_End(SHA256_CTX*, char[SHA256_DIGEST_STRING_LENGTH]);
	char* SHA256_Data(const u_int8_t*, size_t, char[SHA256_DIGEST_STRING_LENGTH]);

	void SHA384_Init(SHA384_CTX*);
	void SHA384_Update(SHA384_CTX*, const u_int8_t*, size_t);
	void SHA384_Final(u_int8_t[SHA384_DIGEST_LENGTH], SHA384_CTX*);
	char* SHA384_End(SHA384_CTX*, char[SHA384_DIGEST_STRING_LENGTH]);
	char* SHA384_Data(const u_int8_t*, size_t, char[SHA384_DIGEST_STRING_LENGTH]);

	void SHA512_Init(SHA512_CTX*);
	void SHA512_Update(SHA512_CTX*, const u_int8_t*, size_t);
	void SHA512_Final(u_int8_t[SHA512_DIGEST_LENGTH], SHA512_CTX*);
	char* SHA512_End(SHA512_CTX*, char[SHA512_DIGEST_STRING_LENGTH]);
	char* SHA512_Data(const u_int8_t*, size_t, char[SHA512_DIGEST_STRING_LENGTH]);

#endif /* SHA2_USE_INTTYPES_H */

#else /* NOPROTO */

	void SHA256_Init();
	void SHA256_Update();
	void SHA256_Final();
	char* SHA256_End();
	char* SHA256_Data();

	void SHA384_Init();
	void SHA384_Update();
	void SHA384_Final();
	char* SHA384_End();
	char* SHA384_Data();

	void SHA512_Init();
	void SHA512_Update();
	void SHA512_Final();
	char* SHA512_End();
	char* SHA512_Data();

#endif /* NOPROTO */

#ifdef	__cplusplus
}
#endif /* __cplusplus */

typedef SHA256_CTX sha256_ctx;
typedef SHA512_CTX sha512_ctx;

#else //!DO_NOT_USE_CRYPTOPP_SHA

#ifdef _WIN32
#include <sha.h>
#else
#include "../../config.h"
#define CRYPTOPP_INCLUDE_SHA <CRYPTOPP_INCLUDE_PREFIX/sha.h>
#include CRYPTOPP_INCLUDE_SHA
#endif
typedef struct {
	CryptoPP::SHA256 sha;
} sha256_ctx;

typedef struct {
	CryptoPP::SHA512 sha;
} sha512_ctx;

#endif //DO_NOT_USE_CRYPTOPP_SHA

#define SHA256_DIGEST_SIZE ( 256 / 8)
#define SHA512_DIGEST_SIZE ( 512 / 8)

void sha256_init(sha256_ctx * ctx);
void sha256_update(sha256_ctx *ctx, const unsigned char *message,
	unsigned int len);
void sha256_final(sha256_ctx *ctx, unsigned char *digest);
void sha256(const unsigned char *message, unsigned int len,
	unsigned char *digest);


void sha512_init(sha512_ctx *ctx);
void sha512_update(sha512_ctx *ctx, const unsigned char *message,
	unsigned int len);
void sha512_final(sha512_ctx *ctx, unsigned char *digest);
void sha512(const unsigned char *message, unsigned int len,
	unsigned char *digest);


typedef sha512_ctx sha_def_ctx;

static void sha_def_init(sha_def_ctx *ctx)
{
	sha512_init(ctx);
}

static void sha_def_update(sha_def_ctx *ctx, const unsigned char *message,
	unsigned int len)
{
	sha512_update(ctx, message, len);
}

static void sha_def_final(sha_def_ctx *ctx, unsigned char *digest)
{
	sha512_final(ctx, digest);
}

static void sha_def(const unsigned char *message, unsigned int len,
	unsigned char *digest)
{
	sha512(message, len, digest);
}

#define SHA_DEF_DIGEST_SIZE ( 512 / 8)

const static char* sha_def_identifier = "sha512";

#endif /* __SHA2_H__ */

